translate syntax to ES6

Author: marcobiedermann

bin/getcss

@@ -1,17 +1,16 @@
 #!/usr/bin/env node
 
-var fs = require('fs');
-var program = require('commander');
-var normalizeUrl = require('normalize-url');
-var getCss = require('..');
+const program = require('commander');
+const normalizeUrl = require('normalize-url');
+const getCss = require('..');
 
 program
   .version('0.0.1')
   .command('* <url>')
-  .action(function(url) {
-    if(url) {
+  .action((url) => {
+    if (url) {
       url = normalizeUrl(url, { stripWWW: false });
-      getCss(url, { verbose: true }).then(function(css) {
+      getCss(url, { verbose: true }).then((css) => {
         console.log(css.css);
       });
     }

index.js

@@ -1,30 +1,30 @@
-'use strict';
-
-var q = require('q');
-var isCss = require('is-css');
-var isPresent = require('is-present');
-var isBlank = require('is-blank');
-var isUrl = require('is-url-superb');
-var request = require('request');
-var cheerio = require('cheerio');
-var normalizeUrl = require('normalize-url');
-var stripHtmlComments = require('strip-html-comments');
-var resolveCssImportUrls = require('resolve-css-import-urls');
-var ua = require('ua-string');
-
-var getLinkContents = require('./utils/get-link-contents');
-var createLink = require('./utils/create-link');
-
-module.exports = function(url, options){
-  var deferred = q.defer();
-  var options = options || {};
+const q = require('q');
+const isCss = require('is-css');
+const isPresent = require('is-present');
+const isBlank = require('is-blank');
+const isUrl = require('is-url-superb');
+const request = require('request');
+const cheerio = require('cheerio');
+const normalizeUrl = require('normalize-url');
+const stripHtmlComments = require('strip-html-comments');
+const resolveCssImportUrls = require('resolve-css-import-urls');
+const ua = require('ua-string');
+
+const getLinkContents = require('./utils/get-link-contents');
+const createLink = require('./utils/create-link');
+
+module.exports = function (url, options) {
+  const deferred = q.defer();
+
+  options = options || {};
+
   options.headers = options.headers || {};
   options.headers['User-Agent'] = options.headers['User-Agent'] || ua;
   options.timeout = options.timeout || 5000;
   options.gzip = true;
 
   if (typeof url !== 'string' || isBlank(url) || !isUrl(url)) {
-    throw new TypeError('get-css expected a url as a string')
+    throw new TypeError('get-css expected a url as a string');
   }
 
   url = normalizeUrl(url, { stripWWW: false });
@@ -34,15 +34,15 @@ module.exports = function(url, options){
     process.env.NODE_TLS_REJECT_UNAUTHORIZED = '0';
   }
 
-  var status = {
+  const status = {
     parsed: 0,
-    total: 0
+    total: 0,
   };
 
-  var result = {
+  const result = {
     links: [],
     styles: [],
-    css: ''
+    css: '',
   };
 
   function handleResolve() {
@@ -52,19 +52,19 @@ module.exports = function(url, options){
   }
 
   function parseHtml(html) {
-    var $ = cheerio.load(html);
+    const $ = cheerio.load(html);
     result.pageTitle = $('head > title').text();
 
-    $('[rel=stylesheet]').each(function() {
-        var link = $(this).attr('href');
-        if(isPresent(link)) {
-            result.links.push(createLink(link, url));
-        }else{
-            result.styles.push(stripHtmlComments($(this).text()));
-        }
+    $('[rel=stylesheet]').each(function () {
+      const link = $(this).attr('href');
+      if (isPresent(link)) {
+        result.links.push(createLink(link, url));
+      } else {
+        result.styles.push(stripHtmlComments($(this).text()));
+      }
     });
 
-    $('style').each(function() {
+    $('style').each(function () {
       result.styles.push(stripHtmlComments($(this).text()));
     });
 
@@ -73,19 +73,19 @@ module.exports = function(url, options){
       deferred.resolve(false);
     }
 
-    result.links.forEach(function(link) {
+    result.links.forEach((link) => {
       getLinkContents(link.url, options)
-        .then(function(css) {
+        .then((css) => {
           handleCssFromLink(link, css);
         })
-        .catch(function(error) {
+        .catch((error) => {
           link.error = error;
           status.parsed++;
           handleResolve();
         });
     });
 
-    result.styles.forEach(function(css) {
+    result.styles.forEach((css) => {
       result.css += css;
       status.parsed++;
       handleResolve();
@@ -107,37 +107,45 @@ module.exports = function(url, options){
     status.total += link.imports.length;
     result.css += css;
 
-    link.imports.forEach(function(importUrl) {
-      var importLink = createLink(importUrl, importUrl);
+    link.imports.forEach((importUrl) => {
+      const importLink = createLink(importUrl, importUrl);
       result.links.push(importLink);
 
       getLinkContents(importLink.url, options)
-        .then(function(css) {
+        .then((css) => {
           handleCssFromLink(importLink, css);
         })
-        .catch(function(error) {
+        .catch((error) => {
           link.error = error;
           status.parsed++;
           handleResolve();
         });
     });
   }
 
-  request(options, function(error, response, body) {
+  request(options, (error, response, body) => {
     if (error) {
-      if (options.verbose) console.log('Error from ' + url + ' ' + error);
+      if (options.verbose) {
+        console.log(`Error from ${url} ${error}`);
+      }
+
       deferred.reject(error);
+
       return;
     }
 
-    if (response && response.statusCode != 200) {
-      if (options.verbose) console.log('Received a ' + response.statusCode + ' from: ' + url);
-      deferred.reject({ url: url, statusCode: response.code });
+    if (response && response.statusCode !== 200) {
+      if (options.verbose) {
+        console.log(`Received a ${response.statusCode} from: ${url}`);
+      }
+
+      deferred.reject({ url, statusCode: response.code });
+
       return;
     }
 
     if (isCss(url)) {
-      var link = createLink(url, url);
+      const link = createLink(url, url);
       result.links.push(link);
       handleCssFromLink(link, body);
     } else {

test/results.json

@@ -1,15 +1,14 @@
-var assert = require('assert');
-var createLink = require('../../utils/create-link');
+const assert = require('assert');
+const createLink = require('../../utils/create-link');
 
-describe('create-link', function() {
-
-  it('should create the correct link object', function() {
+describe('create-link', () => {
+  it('should create the correct link object', () => {
     assert.deepEqual(
       createLink('../bar.css', 'http://foo.com/css/my-css.css'),
       { link: '../bar.css', url: 'http://foo.com/bar.css', css: '' });
   });
 
-  it('should correctly resolve full url links', function() {
+  it('should correctly resolve full url links', () => {
     assert.deepEqual(
       createLink('http://foo.com/bar.css', 'http://foo.com/css/my-css.css'),
       { link: 'http://foo.com/bar.css', url: 'http://foo.com/bar.css', css: '' });

test/utils/create-link-test.js

@@ -1,35 +1,34 @@
-var assert = require('assert');
-var resolveUrl = require('../../utils/resolve-url');
+const assert = require('assert');
+const resolveUrl = require('../../utils/resolve-url');
 
-describe('resolve-url', function() {
-
-  it('should correctly resolve a .. relative link', function() {
+describe('resolve-url', () => {
+  it('should correctly resolve a .. relative link', () => {
     assert.equal(resolveUrl('http://foo.com/some/path', '../bar.css'), 'http://foo.com/some/bar.css');
   });
 
-  it('should correctly resolve a .. relative link when the url has a trailing /', function() {
+  it('should correctly resolve a .. relative link when the url has a trailing /', () => {
     assert.equal(resolveUrl('http://foo.com/some/path/', '../bar.css'), 'http://foo.com/some/bar.css');
   });
 
-  it('should correctly resolve a relative link', function() {
+  it('should correctly resolve a relative link', () => {
     assert.equal(resolveUrl('http://foo.com/some/path', 'bar.css'), 'http://foo.com/some/path/bar.css');
   });
 
-  it('should correctly return a full link', function() {
+  it('should correctly return a full link', () => {
     assert.equal(
       resolveUrl('http://foo.com', 'http://foo.com/some/path/bar.css'),
       'http://foo.com/some/path/bar.css');
   });
 
-  it('should correctly resolve an absolute link', function() {
+  it('should correctly resolve an absolute link', () => {
     assert.equal(resolveUrl('http://foo.com/some/path', '/bar.css'), 'http://foo.com/bar.css');
   });
 
-  it('should correctly resolve a relative url from an html file', function() {
+  it('should correctly resolve a relative url from an html file', () => {
     assert.equal(resolveUrl('http://foo.bar/awesome/baz.html', 'baz.css'), 'http://foo.bar/awesome/baz.css');
   });
 
-  it('should correctly resolve an absolute url from an html file', function() {
+  it('should correctly resolve an absolute url from an html file', () => {
     assert.equal(resolveUrl('http://foo.bar/awesome/baz.html', '/baz.css'), 'http://foo.bar/baz.css');
   });
 });

test/utils/resolve-url-test.js

@@ -1,9 +1,9 @@
-var resolveUrl = require('./resolve-url');
+const resolveUrl = require('./resolve-url');
 
 module.exports = function createLink(link, url) {
   return {
-    link: link,
+    link,
     url: resolveUrl(url, link),
-    css: ''
+    css: '',
   };
 };

utils/create-link.js

@@ -1,10 +1,10 @@
-var q = require('q');
-var request = require('request');
+const q = require('q');
+const request = require('request');
 
 module.exports = function getLinkContents(linkUrl, options) {
-  var d = q.defer();
+  const d = q.defer();
 
-  request({ url: linkUrl, timeout: options.timeout, gzip: true }, function(error, response, body) {
+  request({ url: linkUrl, timeout: options.timeout, gzip: true }, (error, response, body) => {
     if (error || response.statusCode !== 200) {
       d.reject(error);
     }

utils/get-link-contents.js

@@ -1,33 +1,34 @@
-var urlResolver = require('url').resolve;
-
-module.exports = function resolveUrl(url, link) {
-  if(link.match(/^(http|https)/g)) {
-    return link;
-  } else {
-    if (isCssFile(url)) {
-      removeExtension(url);
-    } else if(!endsInForwardSlash(url)) {
-      if (!isHtmlUrl(url)) {
-        url += '/';
-      }
-    }
-
-    return urlResolver(url, link);
-  }
-};
+const urlResolver = require('url').resolve;
 
 function endsInForwardSlash(url) {
-  return url.indexOf('/', url.length - 1) != -1;
+  return url.indexOf('/', url.length - 1) !== -1;
 }
 
 function isCssFile(url) {
-  return url.indexOf('.css', url.length - 4) != -1;
+  return url.indexOf('.css', url.length - 4) !== -1;
 }
 
 function isHtmlUrl(url) {
-  return url.indexOf('.html', url.length - 5) != -1;
+  return url.indexOf('.html', url.length - 5) !== -1;
 }
 
 function removeExtension(url) {
   url.replace(/\.[^/.]+$/, '');
 }
+
+
+module.exports = function resolveUrl(url, link) {
+  if (link.match(/^(http|https)/g)) {
+    return link;
+  }
+
+  if (isCssFile(url)) {
+    removeExtension(url);
+  } else if (!endsInForwardSlash(url)) {
+    if (!isHtmlUrl(url)) {
+      url += '/';
+    }
+  }
+
+  return urlResolver(url, link);
+};